“…The FT-IR absorption peaks at 1004 cm À1 and 1087 cm À1 were ascribed to C]C in-plane bending vibration of benzene and C-S inplane stretching vibration, respectively. 42,43 It was notable that the bands of P-O stretch and vibration at 558 cm À1 , 602 cm À1 , 961 cm À1 , 1035 cm À1 , and 1102 cm À1 resulted from the PO 4 3À group and the peak of OH À group showed up in the s-PPS/nano-HA and l-PPS/nano-HA, 35,38 reecting the compound of HA and PPS. Whilst the intensity of peaks from PO 4 3À groups for both s-PPS/nano-HA and l-PPS/nano-HA increased with nano-HA amount.…”